#418CC3
Closest named color: Cool Blue (#4984B8). oklch(61.7% 0.112 243.3), rgb(65, 140, 195).
Aa
Black text reads best on this color (5.76:1).
About this color
#418CC3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.112 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.024 away. Black text reads best on it, at 5.76:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.76:1 |
| White text | 3.64:1 |
Values
| HEX | #418CC3 |
| RGB | rgb(65, 140, 195) |
| HSL | hsl(205, 52%, 51%) |
| OKLCH | oklch(61.7% 0.112 243.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #418CC3 | 3.64:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #418CC3 | 5.76:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #418CC3 text on white | 3.64:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #418CC3 text on black | 5.76:1 | AA | Lc -37.9 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C5E2
oklch(80.8% 0.055 244.3)
-
Step 400
400
#6FA7D3
oklch(70.7% 0.087 243.1)
-
Step 500
500 (this color)
#418CC3
oklch(61.7% 0.112 243.3)
-
Step 600
600
#217AB4
oklch(55.7% 0.121 242.9)
-
Step 700
700
#11669B
oklch(49.1% 0.113 243.3)
-
Step 800
800
#13537E
oklch(42.6% 0.094 243.8)
-
Step 900
900
#194565
oklch(37.6% 0.073 243.7)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#418CC3 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #738DC5 | 0.052 |
| Deuteranopia (no green cones) | #6180C2 | 0.042 |
| Tritanopia (no blue cones) | #00999F | 0.081 |
| Achromatopsia (no color) | #868686 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #418CC3
#418CC3
oklch(61.7% 0.112 243.3)
- #B47535
#B47535
oklch(61.7% 0.112 63.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #418CC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.024
- Steel Blue #4682B4 ΔE 0.032
- Water Blue #0E87CC ΔE 0.034
- Faded Blue #658CBB ΔE 0.036
- Off Blue #5684AE ΔE 0.036
- Dusty Blue #5A86AD ΔE 0.037
- Blue NCS #118AB2 ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.050
Use #418CC3 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.